JPS6319207A - Hermetically closed type kneader - Google Patents

Abstract

PURPOSE:To reduce the operating cost and installation cost and to improve the working environment, by providing a cushion cylinder to the upper part of a floating wt. through a piston rod and performing the rising and falling driving of the floating wt. by a hydraulic cylinder through the cushion cylinder. CONSTITUTION:When a floating wt. 4 is present at an upper end position, a material to be kneaded is charged in a hopper 3 from the charge port 2 thereof and, when a charge door 16 is closed, a hydraulic cylinder 17 begins to operate and the floating wt. 4 begins to fall along with a cushion cylinder 18. The material to be kneaded in the hopper 3 is pushed in a kneading chamber 5 by the falling of the floating wt. 4. The reaction force of the floating wt. 4 receiving at this time is received in a buffering manner by such a phenomenon that the pressures in both upper and lower chambers of the cushion cylinder 18 are well balanced by the slight rising of the piston 19 of the cushion cylinder 18 due to the present of air pressure in said cylinder 18. This phenomenon results in impartation of a cushioning property to the movement of the floating wt. 4 necessary during kneading.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an internal kneading machine that is particularly characterized by a floating weight operating section.

(Prior Art) Fig. 4 shows a conventional closed-type kneading machine, in which a hopper 3 is placed on the top of a kneading machine main body 1 in which a kneading rotor 6.6 is disposed in a kneading chamber 5 having a drop door 7 at the bottom. An air cylinder 9 is connected to the upper end of the hopper 3 via an intermediate member 8.
The floating weight 4 is connected to the lower end of the piston rod 11, and compressed air is supplied to and discharged from the upper and lower air chambers of the air cylinder 9 through the port 14.15, thereby increasing the air pressure of the floating weight 4. Elevation and descent were controlled solely by Note that 2 is a raw material input port.

In this way, in conventional closed kneading machines of this type, the floating weights are operated using air pressure, so this conventional method using air cylinders requires a large amount of air to be raised and lowered when the floating weights are raised and lowered. Since it is necessary to release the high-pressure air into the atmosphere, there are problems in that energy loss is large, running costs are high, and a large amount of noise is generated when the high-pressure air is released.

Furthermore, a large-capacity compressor was required to feed high-pressure air.

(Problems to be Solved by the Invention) In short, because the conventional floating weight operating means is an air cylinder, there are problems such as noise and energy loss due to the release of air. As a result, there was a problem in that a large-capacity compressor had to be prepared.

The present invention was developed to eliminate such problems, and aims to provide an internal kneading machine that reduces operating costs, equipment costs, etc., and improves the working environment.

(Means for Solving the Problems) Therefore, the present invention provides a closed kneading machine having a floating weight that can be raised and lowered in a hopper connected to a kneading machine main body. In addition to providing an air cushion cylinder, a hydraulic cylinder for raising and lowering a floating weight along with the cushion cylinder is fixedly installed on the outside of the hopper as a groove bottom, and this is a means to solve the above problem.

(Function) A hydraulic cylinder fixed outside the hopper controls the raising and lowering of the floating weight necessary for charging, pushing down, and pressing the mixed wire material.

On the other hand, the cushion cylinder integrated with the floating weight via the piston rod has a function of maintaining the cushioning properties of the floating weight necessary for good kneading.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

1 and 2 show an internal kneading machine according to an embodiment of the present invention. In both figures, 2 is a raw material inlet, 3 is a hopper, 4 is a floating weight, 11 is a piston rod, and 16 is an inlet. In the mouth door, these parts are substantially the same as the parts labeled with the same amount in the conventional kneading machine shown in FIG.

In this embodiment, the piston loft 11 has its distal end piston inserted into the cushion cylinder 18 through a guide portion 20 of a rod provided at the upper end of the imper 3. The cushion cylinder 18 is integrated with a piston rod of a hydraulic cylinder 17 fixed to the outside of the hopper 3 via an arm portion. Therefore, the inner body of the cushion cylinder 18 moves up and down following the operation of the hydraulic cylinder 7. Furthermore, air is fed into both chambers of the cushion cylinder 18 that sandwich the piston 19, thereby preventing the piston 19 from freely moving.

As a result, when no extra force is applied to the floating weight 4, when the hydraulic cylinder 17 operates, the cushion cylinder 18, piston rod 11, and floating weight 4 move up and down together following the movement.

Now, when the floating weight 4 is at the upper end position, the material to be kneaded is charged from the input port 2 of the hopper 3, and when the input door 16 is closed, the hydraulic cylinder starts operating, and the floating weight 4 descends together with the cushion cylinder 18. start. By lowering the floating weight 4, the material to be kneaded in the hopper 3 is pushed into the kneading chamber 5.

The reaction force that the floating weight 4 receives at this time is:
The piston 19 rises slightly due to the presence of air pressure in the cushion cylinder 18, and the pressure between the upper and lower chambers in the cylinder 18 is balanced, so that the pressure is cushioned. This provides cushioning against the movement of the floating weights 4 required during kneading.

(Effects of the Invention) As described above in detail, according to the present invention, a cushion cylinder is provided at the upper part of the floating weight via a piston rod, and the floating weight is driven up and down by a hydraulic cylinder via the cushion cylinder. As a result, compared to the conventional air cylinder system that supplies and exhausts large amounts of air, operating costs and equipment costs such as large compressors are significantly reduced, and noise during operation is also reduced, improving the working environment. is improved, and at the same time the cushioning properties of the floating weight are maintained.

[Brief explanation of the drawing]

FIG. 1 is a front view of the main parts of an internal mixer showing an embodiment of the present invention, FIG. 2 is a sectional view of the same side, and FIG. 3 is a sectional view of a conventional internal mixer. Explanation of main parts of the diagram 3 - Hof bar 4 - Floating weight 5 - Kneading chamber 11 - Piston rod 17 - Hydraulic cylinder 18 - Cushion cylinder

Claims (1)

[Claims] In a closed kneading machine having a floating weight that can be raised and lowered in a hopper connected to a kneading machine main body, an air cushion cylinder is provided above the floating weight via a piston rod, and the air cushion cylinder is floating along with the cushion cylinder outside the hopper. A closed kneading machine characterized by a fixed hydraulic cylinder for raising and lowering weights.